Abstract
We propose a microscopic theory of the dynamic magnetoelectric coupling in CuB2O4. The energy levels, the wave functions of Cu2+ (3d9) in an antiferromagnetically ordered sublattice of copper ions, and the probability of magnetic and electric dipole transitions are calculated and invariant components of the magnetoelectric coupling tensor are determined for various magnetic field directions. The results of microscopic and group-theoretical calculations are compared with available experimental data on the absorption and photoluminescence spectra. The photoluminescence intensity diagrams are calculated for different directions of the radiation wavevector.
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ACKNOWLEDGMENTS
The authors are grateful to R.V. Pisarev and M.N. Popova for discussions of experimental data on optical properties of CuB2O4.
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This study was supported by the Foundation for Development of Theoretical Physics and Mathematics BASIS.
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Translated by N. Wadhwa
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Nurmukhametov, A.R., Eremin, M.V. On the Theory of the Dynamic Magnetoelectric Coupling in CuB2O4. J. Exp. Theor. Phys. 135, 339–346 (2022). https://doi.org/10.1134/S1063776122090084
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DOI: https://doi.org/10.1134/S1063776122090084